Dental gage for bridgework.



H. RAYMOND.

DENTAL GAGE FOR BRIDGEWORK.

APPLICATION H150 JAN. I8, 1916.

1 1 73,383. Patented Feb. 29, 1916.

if V 17' 4 In ven tor: )A3 y Atty THE COLUMBIA PLANOGRAPH co, WASHINGTON, n. c.

HARVEY RAYMOND, OF NEW YORK, N. Y.

DENTAL GAGE FOR BRIDGEWORK.

1,1 eases.

Specification of Letters Patent.

Patented Feb. 29, 1916.

Application filed January 18, 1916. Serial No. 72,711.

To all whom it may concern:

Be it known that I, HARVEY RAYMOND, a subject of the Sultan of Turkey, and a resident of New York city, borough of Manhattan, in the county of New York and State of New York, have invented certain new and useful Improvements in Dental Gages for. Bridgework, of which the following is a specification.

The object of my invention is to provide a new and improved gage for holding firmly and securely dental models of the formation of the upper and lower teeth and obtaining measurements and the eXact locations of sockets and abutments for receiving and holding permanent or removable tooth bridges, all of which is very simple in construction and exactly true and reliable in operation.

In the accompanying drawings in which like letters of reference indicate like parts in all the figures: Figure 1 is a vertical longitudinal sectional view of my improved gage for dental models. Fig. 2 isa front view. Fig. 3 is a plan view.

The gage is constructed with a base 1 having at its rear upwardly and rearwardly projecting legs 2, to the upper ends of which a rearwardly projecting horizontal platform 3 is attached or made integral therewith and which is made horizontal and acts as a bed for a turn table. A circular plate 4 is mounted loosely on the platform 3 and has a downwardly projecting screw 5 which passes through an opening in the platform 3 and on this screw a winged nut 6. is screwed for holding the plate 4: in place after adjustment on the platform 3 by turning the plate 4: upon the platform 3. From the plate 4 two spaced standards 7 project upward which are united at their upper ends by a cross piece 8 to make them firm and rigid. The standards are grooved on their inner sides and in the grooves of these standaids the edges of a plate 9 are mounted to slide up and down and the plate can be locked in place by a winged nut 10 screwed on a screw 12 which passes through a vertical slot 13 in one of the standards 7, so that when the plate 9 is moved up and down between the standards, it can be locked firmly in place by means of said nut 10. The plate 9 is provided with a central hub 14: which projects from the faces of the plate 9 and the axis of which is precisely at right angles to the plate 9 and to the standards. This hub has a squared aperture through which i i a rod 15 can slide and said rod 15 is split or forked at its front end so as to receive between the shanks of such split end a gage lower, it canbe locked in place by means of r a clamping screw 17 screwed through the split or forked end of the rod 15. The base 1 is provided with a longitudinal slot 18 in which a screw 19 is mounted so as to extend longitudinally through the slot so that the screw can turn but cannot travel lengthwise. The screw projects from the front end of the base and is provided with a handle 20. On the screw 19 a nut 21 is mounted and secured on the nut is a clamp 22 which extends transversely over the slot 18 and rests upon the upper surface of the base 1. An abutment 23 projects upward from the front of the base 1 and is preferably slightly inclined toward the rear and toward its upper edge.

'The operation is as follows: A plaster cast 24, shown in dotted lines, of the upper or lower jaw is placed on the base and is held between the abutment 23 and theclamp 22 and clamped securely. The rod 15 is then moved lengthwise until the pin 16 is above the desired root or tooth in said plaster cast. T o obtain this location of the pin, the rod 15 is moved forward or backward through the hub 14E and the plate 9 is adjusted vertically, more or less, between the standards 7 and the plate 4 forming the turn table is turned to the right or left and is then held in position by the nut 6. If the pin 16 is thus adjusted it will have the proper relation to the tooth or root selected and will indicate the precise position for a hole or socket to be bored in the same. In the same manner any other holes or sockets can be formed and they will all be precisely parallel to each other.

As all the parts of the instrument are adjustable they will fit the diflerent sizes of casts and can easily be adjusted for the various sizes.

Having described my invention what I claim as new and desire to secure by Letters Patent is:

1. In a dental gage for bridge work, the combination with a base provided with means for holding a plaster cast of the teeth and gums of an upper or lower jaw, of a platform formed on the base, a turn table mounted on the platform, means for locking the turn table in place after adjustment,

standards on the turn table, a plate mounted to slide on said standards, means for locking the plate in place after adjustment, a rod passed through said plate, a gage pin secured on said rod and means for locking said gage pin in higher or lower position, which gage pin extends at right angles to therod, substantially as set forth.

2. In a dental gage for bridge Work, the combination with a base having an abutment, of a screw mounted in the base, a nut onthe screw, a clamping piece extending over the top of the base and connected with the nut on the screw, standards on the rear of the base, a platform on the same, a turn table mounted on the platform, standards on the turn table, a plate mounted to slide on the standards, a rod passed through said plate, a gage pin held in the front end of said rod, means for holding said rod exactly at right angles to the standards and means for holding the gage pin exactly-at right angles to the rod, substantially as set forth. v 3. In a dental gage, the combination with a base for holding a plaster cast of the teeth and gums of an upper or lower jaw, of a standard at right angles to the top of the base, which standard is mounted to turn axially in either direction, a vertical adjustable support mounted on said standard and means for looking it in place, arod ex tending through said support exactly parallel with the base, and adjustable in said support, means for locking the rod in place,

a gage pin held vertically in the end of said .rod and movable up and down While remain- Manhattan, in the county of New York and State of New York this 11 dayof August Copies 01' this patent may be obtained for five cents each, by addressing the Commissioner of Patents;

Washington, D. 0. 

